Crusher



1945' J. T. FOWLER 2, 8

CRUSHER Filed July 3, 1943 2 Sheets-Sheet 2 ls k 24 22 El' 14 g 0 /N\/ENTCR-' 4 JOHNT FOWLER,

HTT'Y Patented Aug. 7, 1945 CRUSHER John T. Fowler, Columbus, Ohio, assignor to The J effrey Manufacturing Company, a corporation of Ohio Application July 3, 1943, Serial No. 493,413

6 Claims,

\ This invention relates to a crusher of the type adapted particularly for crushin such material as coal, metal turnings, or the like, though many of the features may be employed with crushers of other types.

An object of the invention is to provide a crusher with an adjustable screen plate and preferablybut not necessarily with a simultaneously adjustable breaker plate in which mechanism is provided to maintain closed a variable gap or opening as the screen is adjusted.

A further object of the invention is to provide improved mechanism for adjusting the screen of a crusher.

Still another object of the invention is to provide improved means for indicating the position of the adjustable screen of the crusher.

A further object of the invention is to provide efficient, simple and improved means for removably retaining a screen in place on a crusher.

Other objects of the invention will appear hereinafter; the novel features and combinations being set forth in the appended claims.

In the accompanying drawings, Fig. l is a side elevational view of the crusher of my invention; v

Fig. 2 is a front .end view thereof with part of theenclosing cover broken away to show the interior; V

Fig. 3 is a transverse sectional view through the machine;

Fig. l is a view similar to Fig. 3 with the screen in a different position of adjustment and with certain parts positioned to permit removal of the screen;

Fig. 5 is an enlarged detailed view taken on the line 5-5 of Fig. 4 lookingin the direction of the arrows;

Fig. 6 is an enlarged detailed View taken on the line 6-6 of Fig. 4 looking in the direction of the arrows; Fig. 7is an enlarged combination sectional and elevational view of a detail; and

Fig. 8 is an enlarged combination sectional and elevational detail taken on the line 8--8 of Fig. 1.

The crusher of my invention includes a main frame It] which is'built up to provide a substantia'lly totally enclosing housing or casing except that it has a feed opening I I into. which material is fed to the reducing chamber IZ formed therein inwhich is mounted a rotor [:3 which preferably is of essentially the same construction as that disclosed in the patent toNils D, Levin, No. 1,947,783, dated February 20, I934. The bottom of the mainframe, housing creasing ifl'isopen movable sections.

to provide for the free discharge of material after it has been adequately reduced to pass through a screen M which is illustrated in the formof a perforated plate made up of two separately re If desired, the screen l4 may be constructed of one or more sections of axially extending screen bars having the general construction illustrated in the above mentioned patout to Nils D.Levin.

The rotor 13 is mounted upon a rotor shaft 15 which is carried in spaced bearings l6 mounted upon pedestals provided by the main frame. The screen 14 is mounted upon a pivoted screen frame ll, which screen frame I1 is formed by a pair of similar spaced frame members 11, there being one of said frame members [8 adjacent each side of the housing It). Said frame members I8 are rigidly connected by permanently attached cross plate 19 to which a breaker plate 20 is removably attached and is positioned to break material such as coal which strikes it under the impact of the hammers of the rotor 13. The screen frame I! is pivoted as a unit about a transverse shaft 2| which is parallel with the rotor shaft 15 and is preferably placed slightly above and to the rear of said rotor shaft I5.

To provide for swinging movement of the screen frame I! and thus to adjust the position of both the breaker plate 20 and the screen M with respect to the rotor I3 thereby to adjust the size of the final product of said crusher, I provide adjusting means associated with the free end of the screen frame l1. Said adjusting means includes a transverse shaft 22 whichis parallel with the aforesaid shafts l5 and 21 and which is mounted on the parallel side. members of the main frame or housing H] and extends therethrough. The shaft 22 carries a pair of pinion gears 23, one adjacent each end, inside the side plates of saidmain frame 10. The mechanism associated with each of the pinion gears 23 is similar in construction, so only one will be described.

As clearly illustrated in Figs. 3 and 4 of the drawings, a pinion 23 meshes with an arcuate rack 24 which is rigidly attached to the free end of a frame member '8 and thus to the free end of the screen frame l'l. The two gears 23 are rigid with the shaft 22 and thus it is obvious that by rotating said shaft 22, the gears 23 operate through the rack 24 to swing or pivot the screen frame l! about the axis of shaft 2|. It is, of course, evident that the rack 24 will be formed on the arc of 'a circle which has a center coincident with the axis of shaft '2 1. Thus by rotating shaft 22 the screen frame I! can be adjusted, thus adjusting the screen l4 and the breaker plate 20 with respect to the rotor I3. To effect this rotation of the shaft 22, said shaft is provided with a handle 25 (see Fig. 2) which fits onto a squared portion 26 on said shaft 22. This handle receiving structure is provided on opposite ends of the shaft 22 so that the. handle 25 may be selectively connected to either side of the crusher.

To indicate the position of the screen l4 with respect to the rotor |3, I provide a pointer 21 (see Figs. 2 and 7) mounted upon a journal hub 28 rigidly attached to the housing Ill, said pointer 21 being on a removable metal band 29 which may be clamped on the hub 28. The pointer cooperates with a graduated scale 30 preferably formed on a collar 3| which is rigidly attached to the shaft 22 at a position adjacent the hub 28. It is evident that as the shaft 22 rotates, the scale 30 will also rotate and this scale may be graduated in fractions of an inch and thus indicate directly the position of thescreen M with respect to the rOtOr l3. 7

To provide for the clamping and releasing of the screen frame I! so as to relieve the gears 23 and rack 24 of any appreciable working load, the screen frame members l8 and the racks 24 are provided with aligned elongated arcuate slots 32 through which clamping bolts 33 extend (see Figs. 3, 4 and 8). The clamping bolts 33 are preferably provided with wing nuts 34 so they may be operated by hand, though if necessary said wing nuts may be operated by a tool. The wing nuts 34 are preferably provided with keepers 35 welded tothe side plates of the main frame H! to prevent their becoming lost. It is obvious that by tightening the wing nuts 34, the screen frame I? may be clamped positively or tightly against the side 'walls of the main frame or housing In and by releasing said wing nuts 34 said screen frame I! may be released for adjustment.

In addition to the clamping means just described, additional generally similar clamping means in the form of bolts with wing nuts illustrated at 36 may be provided also in association with the side members l8 of the screen frame I! and the side members of the main frame It]. If desired, these supplemental or additional clamping devices 36 may be omitted.

To provide for the ready removal of the sections of the screen l4, each of the frame members I8 is provided with an arcuate groove 31 into which the ends of the axial cross members of each section of screen |4 extend and are held against radial or up and down movement with respect to said screen frame IT.

The left hand end of the left hand screen section l4, as viewed in Figs. 3 and 4 of the drawings, abuts the breaker plate 20. To hold the screen section l4 rigidly in place I provide a cross bar 38 which extends across the right hand end of the right hand screen section M, as viewed in Figs. 3 and 4, and the ends of which are received in the grooves 37. This clamping bar 38 is drawn against the right hand across member of the right hand screen section I4 by means of an L-shaped tie bolt 39 adjacent each end thereof. Each of said tie bolts 39 extends into the clamping or cross bar 38 and has a lower threaded portion extending through a slot in a bracket 40 (see Figs. 3, 4 and rigidly attached to a side plate l8 of the screen frame IT. A wing nut 4| is provided for the lower threaded portion of each tie bolt 39. It is manifest that by tightening the wing nut 4| the sections of the screen l4 may be clamped in position under the influence of the clamping or cross bar 38 and by removing or loosening the wing nut 4| the clamping or cross bar 38 may be removed. Since the wing nuts 4| are below the clamping bar 38 and below the screen I 4, they are easily accessible from the bottom of the crusher. This removal is facilitated in a manner hereinafter described more completely.

Referring particularly to Figs. -3 and 4 of the drawings, it will be seen that a tramp material bin 42 is provided across the front of the crusher housing and includes a swingable cover 43. The top of the tramp material bin 42 includes a deflector plate 44 which has integrally formed side wall liners and which cooperates with a transversely extending member or cross piece in the form of an angle 45. The angle member 45 is rigidly attached to a plate 46 which forms the bottom of the tramp material bin 42. The angle member 45 and plate 46 are slidable forwardly, or to the right as viewed in Figs. 3 and 4 of the drawings, whenever the cover 43 is swung upwardly as illustrated in Fig. 4 of the drawings. This transversely extending sliding composite plate 45, 46 is supported on a ledge on the front wall of the main frame or housing Ill and on spaced abutment lugs 41 which are rigidly attached to the side plates of the housing or main frame l0. Said lugs 41 also limit the rearward travel of said composite plate. When the parts are in the normally assembled relation, as illustrated in Fig. 3 of the drawings, it is evident that there is an opening between the bottom of the angle 45 and the uppermost adjacent portion of the screen l4 and this opening adjacent the free end of the screen I 4 will vary in size with the adjustment of the screen I4 and its supporting frame H, as previously described. To provide a continuous baflle or closure for this opening I provide a pivoted closure or baffle plate 48 which extends from a position adjacent the bottom of the angle member 45 to a position normally in contact with the right hand end of the clamping or cross bar 38, thus maintaining a bafile or closed relation beyond the end of the screen I 4 up to the top of the angle member 45 for all positions of adjustment of said screen l4 and said screen frame Inwardly projecting pins 5| prevent unauthorized upward swinging of said plate 48.

The closure plate 48 is rigidly connected at its top to a pivot rod 49 and the pivot rod 49 together with the plate 48 are removable as a unit since the ends of the rod 49 are mounted in open U-shaped cups or bearings 50 (see Fig. 6) there being one such cup or hearing adjacent and attached to each of the side walls of the main frame or housing It]. When assembled the axle member 45 rests on rod 49 retaining it in bearings 50. To facilitate removal of the sections of screen I4 after the wing nuts 4| have been removed, the tramp bin cover 43 is swung upwardly as illustrated in Fig. 4 of the drawings. The plate 46 and angle 45 are pulled forwardly to the full line position illustrated in Fig. 4 of the drawings and the plate 48 and pivot rod 49 are removed by lifting them upwardly and outwardly through the tramp material bin. This provides an easy path of movement for the .arcuate sections M of the screen so that they can be readily removed through the tramp material bin compartment.

When the parts are reassembled the closure plate 48 maintains the aforesaid described opening effectively closedat all times and it is to .be particularly. noted that this is effected without in any way diminishing the effective open area of the screen 14 as Would be the case under. certain positions of adjustment of the screen I4 if the plate 48 merely extended over the screen [4 without being pivoted.

It is evident that during adjustment of the position of the screen M. by the aforedescribed mechanism including the pinion 23 and racks v24, the closure plate 48 willbe free to swing to various positions, two of which are illustrated in Figs. 3 and 4, respectively, while at all times maintaining the desired closed relation, principally by pins 5 l Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended, and I wish therefore not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I now desire to secure by Letters Patent of the United States is:

1. A crusher including a main frame, a screen frame pivoted thereto including similar spaced apart members, arcuate screen guides on said screen frame members, an arcuate screen removably held in said guides, a bar extending across the end of the screen to hold it in place, downwardly extending tie bolts having their upper ends extending into said bar and held against turning thereby, slotted brackets on said screen frame members, and means including wing ,nuts on the bottoms of said bolts and below said bar and thus readily accessible from the bottom of said crusher for attaching them to said slotted brackets.

2. In a crusher, a main frame, a rotor therein,

' a pivoted screen frame, arcuate screen guides in said screen frame, an arcuate screen receivable in said screen frame, a cross member extending above the free end of said screen frame and mounted on said main frame for sliding movement toward and from the axis of said rotor, means for adjusting said screen frame relative to said cross member, a closure member extending between said cross member and the free end of said screen frame and supported on said main frame, and means providing for removal of both said closure member and said cross member out of the path of said screen while it is being removed from said screen frame, said last named means being constructed and arranged to provide for sliding 'of said cross member out of said path and radially from the axis of said rotor.

3. In a crusher, a main frame, a rotor therein, a pivoted screen frame, arcuate screen guides in said screen frame, an arcuate screen receivable in said screen frame, a cross member extending above the free end of said screen frame and mounted on said main frame, means for adjusting said screen frame relative to said cross member, a closure member extending between said cross member and the free end of said screen frame and pivotally supported in U-shaped bearings on said main frame, said cross member extending above said closure member to hold it in said bearings, and means providing for ready removal of both said closure member and said cross member out of the path of said screen while it is being removed from said screen frame.

4. A crusher including a main frame, a screen frame mounted thereon, a screen on said screen frame, a bar extending across said screen frame to hold said screen thereon, means for removably attaching said bar to said screen frame including tie bolts extending downwardly through said bar and held against rotation thereby and having their lower ends below said screen and freely accessible from the bottom of said crusher, bracket means on said screen frame for receiving the' lower ends of said downwardly extending tie bolts, and nuts threaded on the lower ends of said tie bolts for removably attaching them to said screen frame.

5. A crusher including a main frame, a screen frame mounted thereon, a screen on said screen frame, a bar extending across said screen frame to hold said screen thereon, means for removably attaching said bar to said screen frame including tie bolts extending downwardly through said bar and held against rotation thereby and having their lower ends below said screen and freely accessible from the bottom of said crusher, bracket means on said screen frame for receiving the lower ends of said downwardly extending tie bolts, and means co-operating with the lower ends of said tie bolts for removably attaching them to said screen frame.

6. A crusher including a main frame, a screen frame pivotally mounted thereon, a screen on said screen frame, a tramp material. bin having a bottom formed of a horizontally slidable cross member having a portion projecting above the free end of said screen frame, a pivoted closure member extending from a position below said cross member and overlapping the free end of said screen, said closure member being pivotally mounted in U-shaped bearings on said main frame, said cross member extending over the upper end of said pivoted closure member to hold it in place, and means mounting said cross member for sliding movement to provide for removal of said pivotal member.

' JOHN T. FOWLER. 

